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distrait ndert than otiijiire.

HMSELFAD ANTHONY VAN HAAGEN, OF SA ME PLAGE.

Leners raten No. iosos, met october 11, i810.

EMPRQVEMENT IN PLNING MECHANISMS- The Schedule referred to in these Letters Patent and making part of the same l I, @taps VAN HAAGEN, of Philadelphia, county of Philadelphia. and State of Pennsylvania. have invented certain Improved llaning Mechanism, of which. the following is a specification.

Nature mul Objects of thc I uren tion.

hlyinrention consists of mechanism too fully ilcscribed hereafter to need preliminary explanation, for planing surfaces ot' metal, die.; the main object ot` |ny1nven tion herng the production .of a simplc,ef ticient, readily adjustable, and comparatively cheap tool for that purpose.

Description of the Acconnmnyng Drawing.

Figure 1 is a side view of my improved planing mechanism 5 Figure 2, a sectional view, illustrating the peculiar construction of the adjustable cutters;

higurc 3, a. section ot' fig. 2 on the line 't 2; and

Iliglurqc 4, an enlarged sectional view, illustrating a modified plan of securing the cutting-tools to the ad- Justahle arms.

General Description.

A represents a hcad-stock, similar to that of an ordinary lathe, and carrying a revolving spindle, l), the hcztd-etoclr being, in the present instance, adjustahlc longitudinally only ou suitable ways.

B is the object to he plancd, and is secured by any suitable appliances to a slide, E, which can he moved iu one ldirection only on ways on a slide, ll, which can also he moved in one direction only, and that at right angles to the direction in which thc slide Ecan he moved; in l'act, the arrangement of slides for carrying the object to hc plancd is similar to that otl ordinary slide-rests.

A huh, E', isso secured to the spindle D as to he readily detached therefrom, and within a slot in this huh are jointed two arms, G and G', hy pins (l d, between which is a pin, c, having a head at one cud, hearing against onchalt' of 1the slotted hub, and

a screw-thread at the opposite cud, adapted to an' internal thread in thc opposite sido of the huh, so that on screwing thisv piu tight, the tivo halves of the hub which possess a slight elasticity, will firmly grip the arms G and G.

Un cach ot' these arms is formed a toothed segmcnt, p, the teeth ol` one arm heilig adapted to one thread, and the teeth of the other arm to thc other thread of the duplex screw or worin H, one of these threads being right and the other lefthandcd, so that on turning the screw in one direc tion, the arms will simultaneously turn on their pins apart from each other, and, on turning the screwv in a contrary direction, the arms will turn toward each other.

The worm is so adapted to the end of the slot as to turn freely therein, and is confined laterally hctwecu the same and the segments of thc arms, while it is retained longitudinally hy a projection, in, on the end of thc slot in the hub, adapted to a groove formed in the screw hctwcen thc two worms, as shown in fig. 2.

In figs. 2 and 3, thc cutters q are secured to thu arms in the following manner:

Each cutter is ot' a triangular sectional form, and

has a dovetailcd rib, i', on one ol its flat sides, this lib being adapted to a dove-tailed recess iu thc slotted end of the arm, and the latter heilig provided with a `set-screw, f, by tightening which the said slotted ond of th arm may bc made to grip the dovetailcd rib of ic cutters, and thus secure thc same after adj ustinent.

Another mode ol' securingr thi` cutter to the arm is illustrated in tig. 4.

This plan, however, has been so fully described on a separate application which I have iliade for a patcnt foi-boring and turning mechanism, that au cxplanation ot' it here will le unnecessary.

As the huL` with its arms-revolves, the slide E. with the object B, is caused to traverse so that thc. object must hc pinned hy the cutters, which may hc fed forward to suit the required depth of cut hy moving the cross-head A, although the cut may he rn red to a limited extent by adjusting thc arms nearer to or further from cach other without disturbingr tho head-stock.

ifa narrow ohjcct has to he plain-d, the arms may be so arranged as to ljust sweep past the edges ol' the object, and the cutters may revolve rapidly, hut il a wide object has to he plancd, the cutters may hc adjusted a. corresponding distance iapart from cach other, and they may revolve at a slower speed; in other words, the speed of the cutters should he commensurate with the width of thc :ihjcct to he planed.

I have referred' to the head stock A as beingl movable, so as to feed the cutters toward the ohjeet to be pinned; but it is evident that the headvstock may be stationary, and the spindle` revolve in fixed bearings, and that the slides, which carry thc object to he plancd, may be so arranged that they can bc moved toward the cutters, or the headstock may he arranged to traverse on slides like those of a slide-rest, as the spindle and cutters re- In testimony whereof I lme signed my immo to volvo, the object to be planed boing, in this onse, stathis spcoilication in the presence of two subscribing tion: ly.

witnesses. T y Claims CLAUS yVAL HAAGLNZ Y. The two :t1-ms, G am1G,with. their toothed seg- Wituesses: ments' and pins (l d', :md the right and left-handed FRANK B. RICHARDS, worm H, the whole being combined and adapted to HARRY SMITH.

the slotted hub E', substantially as described. 

